The 12" rechargeable fan works up to 32 hours without power, enjoy a night of sleep with fresh air, no more complains about heat. You can use this fan indoor and outdoor as the occasion requires. It is made of durable materials, this will ensure that it last long and you get value for your money. The Lontor rechargeable fan is very affordable, energy efficient and it operates quietly, even at high speed. This fan is a must have for everyone.